Carrier transfer from wetting layer to quantum dots studied by cw-resolved and time-resolved photoluminescence in CdSe/ZnSe quantum dot system

Tae Soo Kim; Byoung Woo Lee; Eunsoon Oh; Sanghoon Lee; J. K. Furdyna

doi:10.1063/1.3354064

Carrier transfer from wetting layer to quantum dots studied by cw-resolved and time-resolved photoluminescence in CdSe/ZnSe quantum dot system

Tae Soo Kim, Byoung Woo Lee, Eunsoon Oh, Sanghoon Lee, J. K. Furdyna

Department of Physics

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

We have studied the cw-resolved and time-resolved photoluminescence (PL) spectra of the CdSe quantum dots (QDs), where PL peaks from the "wetting layer" and from the QDs are observed. The temporal behavior of the PL spectra after a short-pulse laser excitation provides evidence of carrier transfer from the wetting layer to the QDs for sufficiently low excitation power and sufficiently high temperature. The dependences of the cw-PL spectra and of PL lifetimes on excitation power are explained by the saturation of the carrier concentration in the QDs as the excitation power increases.

Original language	English
Article number	063517
Journal	Journal of Applied Physics
Volume	107
Issue number	6
DOIs	https://doi.org/10.1063/1.3354064
Publication status	Published - 2010

Bibliographical note

Funding Information:
The authors thank M. Dobrowolska for illuminating discussion of the morphology of the CdSe/ZnSe QD system. This work was supported by the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MEST) (Grant No. R01-2008-000-20756-0) and the National Science Foundation (Grant No. DMR06-03762).

ASJC Scopus subject areas

Physics and Astronomy(all)

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Cite this

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title = "Carrier transfer from wetting layer to quantum dots studied by cw-resolved and time-resolved photoluminescence in CdSe/ZnSe quantum dot system",

abstract = "We have studied the cw-resolved and time-resolved photoluminescence (PL) spectra of the CdSe quantum dots (QDs), where PL peaks from the {"}wetting layer{"} and from the QDs are observed. The temporal behavior of the PL spectra after a short-pulse laser excitation provides evidence of carrier transfer from the wetting layer to the QDs for sufficiently low excitation power and sufficiently high temperature. The dependences of the cw-PL spectra and of PL lifetimes on excitation power are explained by the saturation of the carrier concentration in the QDs as the excitation power increases.",

author = "Kim, {Tae Soo} and Lee, {Byoung Woo} and Eunsoon Oh and Sanghoon Lee and Furdyna, {J. K.}",

note = "Funding Information: The authors thank M. Dobrowolska for illuminating discussion of the morphology of the CdSe/ZnSe QD system. This work was supported by the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MEST) (Grant No. R01-2008-000-20756-0) and the National Science Foundation (Grant No. DMR06-03762).",

year = "2010",

doi = "10.1063/1.3354064",

language = "English",

volume = "107",

journal = "Journal of Applied Physics",

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T1 - Carrier transfer from wetting layer to quantum dots studied by cw-resolved and time-resolved photoluminescence in CdSe/ZnSe quantum dot system

AU - Kim, Tae Soo

AU - Lee, Byoung Woo

AU - Oh, Eunsoon

AU - Lee, Sanghoon

AU - Furdyna, J. K.

N1 - Funding Information: The authors thank M. Dobrowolska for illuminating discussion of the morphology of the CdSe/ZnSe QD system. This work was supported by the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MEST) (Grant No. R01-2008-000-20756-0) and the National Science Foundation (Grant No. DMR06-03762).

PY - 2010

Y1 - 2010

N2 - We have studied the cw-resolved and time-resolved photoluminescence (PL) spectra of the CdSe quantum dots (QDs), where PL peaks from the "wetting layer" and from the QDs are observed. The temporal behavior of the PL spectra after a short-pulse laser excitation provides evidence of carrier transfer from the wetting layer to the QDs for sufficiently low excitation power and sufficiently high temperature. The dependences of the cw-PL spectra and of PL lifetimes on excitation power are explained by the saturation of the carrier concentration in the QDs as the excitation power increases.

AB - We have studied the cw-resolved and time-resolved photoluminescence (PL) spectra of the CdSe quantum dots (QDs), where PL peaks from the "wetting layer" and from the QDs are observed. The temporal behavior of the PL spectra after a short-pulse laser excitation provides evidence of carrier transfer from the wetting layer to the QDs for sufficiently low excitation power and sufficiently high temperature. The dependences of the cw-PL spectra and of PL lifetimes on excitation power are explained by the saturation of the carrier concentration in the QDs as the excitation power increases.

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U2 - 10.1063/1.3354064

DO - 10.1063/1.3354064

M3 - Article

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SN - 0021-8979

VL - 107

JO - Journal of Applied Physics

JF - Journal of Applied Physics

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M1 - 063517

ER -

Carrier transfer from wetting layer to quantum dots studied by cw-resolved and time-resolved photoluminescence in CdSe/ZnSe quantum dot system

Abstract

Bibliographical note

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